New subject: [Einstein Toolkit] #1084: increase default value of RELTOL to 1e-12

11 Sep 2012


      #1084: increase default value of RELTOL to 1e-12
-------------------------+--------------------------------------------------
 Reporter:  rhaas        |       Owner:     
     Type:  enhancement  |      Status:  new
 Priority:  minor        |   Milestone:     
Component:  Cactus       |     Version:     
 Keywords:  test system  |  
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 right now the defaults for ABSTOL and RELTOL (see lib/sbin/RunTestUtils.pl
 line 587) are
 {{{
   $runconfig{"ABSTOL"} = 1e-12;
   $runconfig{"RELTOL"} = 0;
 }}}
 in particular RELTOL is set to zero. This means that for values of order
 1000 or so ABSTOL requests more significant figures than a double
 provides.
Instead it would seem to be more sensible to request RELTOL = 1e-12 as
 well which will leave the accuracy unchanged for values of order unity but
 make the test system less prone to false alarms for values that are larger
 (eg sum reductions, values close to the puncture)
-- 
Ticket URL: https://trac.einsteintoolkit.org/ticket/1084
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